Fluid motor, pump, and the like.



C. H. BIRCH. FLUID M OTOR, PUMP, AND THE LIKE.

APPLICATIONFILED SEPT. 6, I910.

Patented Nov. 2, 1915.

4 SHEETS-SHEET I.

I T I I I I IN VEN TOR WITNESSES:

ZW/ZLM A TTORNEY COLUMBIA PLANOURAPH cov. WASHINGTON, D. c.

C. H. BIRCH. FLUID MOTOR, PUMP, AND THE LIKE.

APPLICATION FILED SEPT. 6,1910.

4 SHEET$SHEET 2- FIG' 2 Patented Nov. 2, 1915.

#MMWL A TTORNE Y COLUMBIA PLANOGRAPH co., WASHINGTON, n c.

C. H. BIRCH.

FLUID MOTOR, PUMP, AND THE LIKE.v

APPLICATION FILED SEPT. 6. 1910.

l 1 58,62 1 Patented Nov. 2, 1915.

4 SHEETSSHEET 3.

FIG: 8

A TTORNE Y COLUMBIA PLANOGRAPH c0.. WASHINGTON. D. c.

C. H. BIRCH.

FLUID MOTOR, PUMP, AND THE LIKE.

APPLlCATlON FILED SEPT-6,1910.

Patented Nov. 2, 1915.

4 SHEETVSSHEET 4.

m m 1 F 2 1 1 2 11 ,1T |||||ll 3 QQ:

flaw/V4 5 $1M; f/111% $101,

r nnro FLUID MOTOR, PUMP, AND THE LIKE.

Application filed September 6, 1910-.

To all whom it may concern:

Be it known that I, CHARLES H. BIRCH, a citizen of the United States, residing at Chicago, in. the county of Cook and State of Illinois, have invented certain new and useful Improvements in: Fluid Motors, Pumps, and the like.

My invention relates to motors, pumps or the like wherein a plurality of blades or impellers are arranged to rotatein a suitably formed cylinder and cooperate with the walls of the cylinder to move or be moved by a fluid passing through the cylinder.

The object of my invention is to provide a simple, efficient and durable device of the kind described wherein substantially all of the advantages of both a reciprocating and a rotary device are secured with few or none of the disadvantages of either.

To this end my invention consists in. the novel construction, arrangement and combination of parts herein shown and described and more particularly pointedout in the claims.

In the accompanying drawings wherein like or similar reference characters indicate like or corresponding partsz' Figure 1 is a side elevation of my device with one end shown in section, taken substantially on line 1'-1 of Fig. 2. Fig. 2 is a section taken substantially on line 22 of Fig. 1. Fig. 3, is a side elevation of one of the blades of my device shown in its normal relation to the blade driving mechanism upon the casing. Fig. 4 is an end elevation of the parts shown in Fig. 3. Figs. 5, 6 and 14 are details of the mechanism for preventing leakage between the blades and the blade driving mechanism upon the casing. Figs. 7 and 8 are side and edgeelevations respectively of the blade driving mechanism upon the shaft. Figs. 9 and 10 are enlarged details of the mechanism shown in Figs. 7 and 8; Figs. 11 and 12 are details of parts of the mechanism shown in Figs. 7 and 8. Fig. 1 3 is a view similar to Fig. 2'but showing the parts in a slightly different position.

In the drawings for the purpose of illustration my invention is shown embodied in the construction of apump in which 1 is a cylindricalcasing provided with an inlet Specification of Letters Patent.

Patented Nov. 2, 1915. Serial no; 530,477.

opening 2 and an outlet opening 3 arranged in any desired relation to each other. The ends of the casing 1 are each preferably slightly enlarged as at 6-6 and provided with cover plates 55 respectively rigidly secured to the casing and each provided with a central transverse bearing 40..

A shaft 4 is rotatably mounted in, and extends bet-ween the bearings 40 with one end 41 projecting sufficiently beyond its bearing to receive a pulley, gear, or other suitable driving means for rotating the shaft. A pair of drivers 1818 are mountedupon the shaft 4, one positioned in each enlarged part 6 of the cylinder. Each driver is rigidly secured upon the shaft l with a part 7 at its periphery arranged to bear against the shoulder 42 at the junction between the main or central portion of the cylinder and the enlarged part 6.

In the form shown three blades or impellers 88 S are provided upon the shaft 4, each independently rotatable upon the shaft and suitably formed to fill the space between the drivers 18 and extend from the shaft 4 to the cylinder wall. The parts cooperating with the shaft and cylinder wall are provided with resilient packing or other convenient means arranged to prevent leakage at the margins of the blades. The several blades may be rotatably attached to the shaft 4 in any desired manner, as shown, each blade is provided with one or more bearings or rings 43 adapted to fit the shaft and in the preferred form shown a series of rollers 35 are positioned between the shaft and the ring to serve as a roller bearing and eliminate friction as far as possible. Suitable means are also provided to prevent leakage between the several rings. In the form shown a pair of plates or washers 27 27 are provided at the ends of each ring 43 and a resilient washer 28' formed of leather or other suitable material is positioned between them to hold the plates 27 in contact with their respective rings and prevent leakage at the margins of the plates. Suitable means are also provided at the outer edge of each blade to form a fluid tight joint between the blade and the cylinder wall. As shown a recessac'isprovided in the forward edge of each blade and a strip strip into the blade to hold the strip 29 in position.

Any suitable means may be provided to rotate the blades 8 and control their position.

As shown each blade is provided at its exftremities with a suitable notch or recess 47 formed in the rear wall of the blade and a pair of hooks or latches 19 are pivotally mounted upon the driver 18 with a part 48 adapted to project beyond the face of the driver and in position to enter the recess 47 in each blade, so that as the shaft is rotated the hooks 19 upon the drivers will successively engage certain of the blades and lock the same to the shaft.

Suitable means are also provided to re tract the hooks 19 to disengage the same from the blades and'to control the position of the hook. As shown each hook 19 is pivotally mounted upon a stud or projection 20 with a rectangular opening 24 intermediate the ends of the hooks. A pin 22 is rigidly mounted upon the driver and extends through the opening 24 and a cam 21 is rotatably mounted upon the pin 22 adapted to cooperate with the walls of the opening to control the position of the hook and move the same into or out of engaging position. Any desired means may be provided to operate the cam 21. In the preferred construction shown, an ar1n49 is formed integrally with or rigidly secured to the cam 21 and projects slightly beyond the periphery of the driver 18 at each side of the center line of the cam. A pair of stops or pins 25-26 are provided upon the inner wall of the enlarged part 6 of the cylinder, each arranged in the path of one end of the arm so that as the driver 18 is rotated the opposite ends of the arm 49 will be successively engaged by the stops 25 and 26 and partially rotated in opposite directions at each engagement thereby moving the cam 21 and alternately retracting and projecting the part 48 upon the hook 19. The inlet opening 2 and outlet opening 3 are arranged in close proximity to each other and in direct communication with the interior of the cylinder 1, a portion of the cylinder 50' being positioned between them. The several parts are so proportioned and arranged that when each blade engaged by the hooks 19 has sufliciently engaged the outlet side of the part 50 to prevent leakage.

between the inlet and the outlet openings, the hooks 19 engaging that particular blade are retracted and held in their retracted position until they have passed the blade, when they are again projected into positlon to engage the next preceding blade in the cylinder, which has been advanced into a suitable position to be rengaged by the hooks 19 and is still preferably in position to cooperate with the inlet side of the part 50 to prevent ment 51 intermediate its ends and a trans verse socket or shell 52 is provided in the easlng at the ]t1I10t10I1 of one slde of said recess wlth the main wall of the cyl1nder,one end of the socket 52 is provided with a suitable bearing 53. A sleeve or, collar 54 or other suitable means adapted to serve as-a bearing is provided in the opposite endofthe socket arranged to cooperate wlth the bearing 53 to rotatably support a shaft 10 in position. A

worm-wheel 55 is rigidly mounted upon the shaft 10 with a portion of itsperiphery ex;- tending into the recess 51. Each blade 8' 1s provided with a portion extending into the recess 51 and with means adapted to co- 7 operate with the worm-wheel 55 to control the position and movements of the blade when released from the drivers 18. In the each blade and a roller 9 is positioned in the bearing with one end 57 projecting and arrangec to cooperate with the wormwheel.

In the form shown a plate 30 is also adjustably secured to each blade part ally 1nclosing the end 57 ofthe roller 9'and adapted 1 00 form shown, a bearing 56 is provided upon p to cooperate with the roller and worm-wheel Q 55 to prevent leakage past the blade at this point, yet permit the side of the; roller to engage the threads upon the worm-wheel to V reduce "the frictional engagement with the worm-wheel asfar as possible. Anv suitable meansmay be provided for rotating the shaft 10.' In the form shown suitable bearings 5859 are p'rovidedupon the casing and a shaft 13 is rotatably" inounted'in said bearings andprovided with a spur gear 14' at one end. A spur gear 16 is also provided upon the shaft 4 and an 1ntermediate-gear 15 is mounted upon a suitable stud 17 rigidly secured to the head 5 a and adapted to mesh with and transmit power from the'gear 16 to the gear 14. A v

beveled gear 12 is also provided upon the shaft 13 and" arranged to mesh with a S1II1L- lar gear 11 upon the shaft 10, the several parts are so proportioned and timed that the worm-wheel 55 engages the roller 9 of a blade just at the instant the hooks" 19 release the blade. The blade is then moved by the worm-wheel 55 into a position to be engaged by the next pair of hooks 19 as soon as the next following blade is brought into release position and each blade is moved forward from the release to the reengaging position by the worm 55' so that the released blade and the next succeeding pair of hooks 1 9 arrive at the re'engaging position substantially simultaneously and the blade is wholly released from the wormat the instant the hooks l9 engage it.

In operation the shaft 4 is rotated in the direction indicated in Fig. 2. The hooks 19 are engaged with two blades 8 and 8' which are thereby locked to the shaft t and move at a substantially uniform velocity when the shaft is rotated. The blade 8 is engaged by the worm and is substantially stationary, the movement being merely sufficient to carry the blade 8 into position to be engaged by the hooks 19 when theyreach the engaging position after bringingthe blade 8 into the position shown in lfig. 13. At this point the blade 8 is released from the drivers 18 and engaged by the worm 55 and as soon as the hooks l9 reach a position to engage the blade 8 the same is released from the worm 55 and moved forward by the drivers with the blade 8 until the blade 8 arrives at the release position, the blade 8 having in the meantime moved from the release position to the engaging position. The operation continues as above described for each half turn of the shaft 4. p \Vhen thus constructed my device embodies substantially all of the advantages of areciprocating pump. The several impellers operate substantially as pistons and may be moved as slowly as desired to secure the desired discharge of fluid. My device also secures practically all of the advantages of a rotary pump having large clearwater passages'wholly free from valves or other inipediments common in all reciprocating pumps. It may also be operated substantially as rapidly as desired, as there are no valves to seat, and, no columns of water which must be stopped and started with each change of movement of the piston. 1

Obviously the mechanism herein described may be employed as a very efiicient water motor without 'material alterations, but where elastic fluid, such as steam, air or gas is to be employed to operate the device, suitable cut-off mechanism may be provided to increase the economy of its operation.

Having thus described my improvement it is obvious that various immaterial modifications may be made in my device without departing from, the spirit of my invention, hence I do not wish to be understood' as limiting myself to the exact form or construction shown.

\Vhat I claim as. new and desire to secure by Letters Patent is:

1. In a device of the kind described, a stationary cylindrical casing, a shaft extending longitudinally of said casing and a plurality of bladeseach independently and rotatablyniounted upon said shaft and extending tothe wall of said casing, in combination with means operated by the movements of said shaft for controlling the relative position of said blades and producing a variable movement between the 2'. In a device of the kind described, a stationary cylindrical casing, a rotatable shaft extending longitudinally of said casing and a plurality of blades each independently and rotatably mounted upon said shaft and filling the space between the shaft and the wall of the casing, in combination with means operated by the movements of said shaft for controlling. the relative position of said blades and producing a variable movement between them- 3. In a device of the kind described, a stationary cylindrical casing, a shaft extending longitudinally of said casing-and a plurality of radial blades each independently and re tatably mounted upon said shaft and extending to the wall of said casing, in combination with means positively connected to said shaft for controlling the relative position of said blades and producing a variable movement between them.

4. In a device of the kind described, a stationary cylindrical casing, a rotatable shaft extending longitudinally of, and centrally positioned in said casing and a plurality of blades each independently and loosely mounted upon said shaft and extending to the wall of said casing, in combination with means positively connected to said shaft for controlling the relative position of said blades and producing a variable movement between them.

5. In a device of the kind described, a stationary cylindrical casing, a rotatable-shaft extending longitudinally of, and centrally positioned in said casing and a plurality of radial blades each loosely and independently mounted upon said shaft and extending to the wall of said casing, in combination with means periodically engaging said blades for controlling the relative position of said blades and producing a variable movement between them. i

6. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades independently mounted upon said shaft and extending to the wall of said casing, in coinbination with means for' rotating said shaft and means for locking each of said blades'to said shaft during .certain parts of each rotation of the blade and to said casing during other portions of its movement.

7. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of I blades each loosely and independently mounted upon said shaft and extending to said casing, in combination with meansfor rotating said shaft and means for locking each of said blades to said shaft during certain parts of each rotation of the blade and to said casing during other portions of its movement.

8. In a device of the kind described, a cylindrical casing, ashaft extending longitudinally of said casing and a plurality of blades independently mounted upon said shaft and extending to the Wall of said casing, in combination with means upon the shaft for. locking each of said blades to the shaft during certain portions of each rotation of the blade, and means upon the casing for locking each plate to the casing during other portions of its movement. I

.9. In a device of the kind described, a

cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades independently mounted upon said shaft and extending to the wall of said casing, in combination with means upon the shaft for locking each of said blades to the shaft during certain portions of each rotation of the blade and means upon the casing controlled by the movements of the shaft for locking each blade to the casing during certain portions of its movement.

10. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaftand extending to the Wall of said casing, in combination With means upon the shaft for moving said blades a part of a rotation and separate means for moving said blades another part of a rotation.

11. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaft and extending to the wall of said casing, in combination with means upon the shaft for moving said blades a part of a rotation and separate means mounted upon the casing for moving said blades another part of a rotation.

12. In adevice of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of single independent blades mounted upon said shaft and extending to the wallof said casing, in combination with means rigidly mounted upon the shaft for engaging each blade and controlling the same a part of a rotation releasing said blade at a predetermined point and engaging the next preceding blade and means for moving each disengaged blade to the point of reengagement.

13. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaft and extending to the wall of said casing, in combina-' tion with means mounted upon the shaft for engaging a plurality of said blades and moving each blade for a part of a rotation releasing each blade ata predetermined point and engagingthe next preceding blade, and separate means for moving each blade to complete its rotation, I j I 7 let. In a device of the kind described, a cylindrical casing, a shaftextendinglon'gitudinally of said casing and a'plurality of blades mounted upon said shaft and extend ing to the wall of said casing, in combination with means upon the shaft for successively engaging said blades and moving each blade a part of a rotation, and means upon the casing for engaging each blade as it is released from the shaft and moving the same to complete its rotation. 15. In a device'of the kind described, a cylindrical casing, a shaft extending longitudinally. of said casing and a plurality of blades mounted uponsaid shaft and extending to the wall of said casing, in-combination with means upon the shaftfor successively engaging the blades and moving each blade for a part of a rotation and means upon the casing for engaging each blade'as it is released from the shaft and moving the same into position to be again engaged by the means upon the shaft. A 16. In a device of the kind described, a cylindrical casing, a shaft extendinglongitudinally of said casing and a plurality of blades mounted upon said shaft and extend ing to the Wall of said casing, in combination with automatic mechanism mounted upon said shaft adapted to successively engage said blades and move each blade a part of a rotation, means upon the casing for controlling the engagement and disengagement of said mechanism and separate means for. moving each blade a partof each rotation.

17. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaft and ex controlling the engagement and disengagement of said mechanism andseparatemeans for movmg each blade a part of each rotation.

.,bi11ation ivith a )air of drivers ri idl ,se-

, 18. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted uponsaid shaft and ex tending tothe Wall of said casing, in come cured to said shaft one at each endof said casing, automatic mechanismmounted upon each driver adapted to successively engage said blades and move each blade a part of a rotation, means upon .theicasingfor controllingthe engagement and disengagement of saidmechanism and separatemeans posi tioned intermediate said drivers for moving each blade a part of each rotation.

19. Ina device of the kind described, a

cylindrical casing,.a shaft extending. longitudinally of said casing and a pluralityLof blades mounted upon said shaft andextending to the wall of said casing, com-' binat on with ,a: pair of drlvers r gidly mounted upon said shaft one at each end of said casing, automaticmechanism mounted upon eachdriver adapted to successively engage said blades andYmovefeach bladera 1 part of arotation, means upon thecasing for controlling the engagement and disengagement ofv said mechanism, and separate means positioned intermediate said drivers and controlled by the movements of 'said shaft for engaging said blades andm'oving the same a part of a rotationras soonas disengaged from said drivers. i v H V '20. In a device of :the kind described, a cylindrical casing, a shaft extending longitudinallyof said casing and a plurality ,of blades mounted upon said shaft and extendingto the Wall of said-casing, in combination With meansfor rotating said shaft and means upon the shaft for moving said blades a part of arotation, aserevv-threaded tioned at substantially right angles to the center line of said casing,-1neans upon each blade adapted to cooperate-avithsaid thread ed member to control the movement of i'the blade during apart .of a rotation-and means,

for rotatin said member. I

22. In a device of the kind described, cylindrical casing, a shaft extend ng dongltudinafl-ly 'of .-sa1d cas1n,g and ,a plurality of,

blades mounted upon said shaft and extendingto the Wall of said casing, in combination with means for rotating said shaft and means upon the shaft for moving said blades a part of a rotation, a screw-threaded member upon said casing, and a roller rotatably mounted upon each blade adapted to cooperate with said threaded .meinber to control the movement of said blade during part of each rotation, and means for rotating said threaded member.

' .23. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaft and extending to the Wall of said casing, in comtending-to the Wall, of said casing,,in combination With means for rotating said shaft and means for moving said blades a partof a rotation, a screw-threaded member upon said casing With its axis positioned-at substantially right angles to the center-dine of said casing, a roller rotatably mounted upon each blade adapted to cooperate with said threaded member to momentarily control themovement of said blade,-and means connected to said shaft for rotating said threaded member. I

, 25. In adeviceof the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaftandextendingto the Wall 'ofsaid casing, in combination with means upon the shaft for locking said bladestto the shaft during certain portions of eachrotation of the shaft, a screwthreaded member upon said casing and means upon each blade adapted to cooperate with said threaded member 'to temporarily control the movement of said blade, and means for rotating said threaded member.

26. In a device of the kind described, :a cylindrical casing, a shaft extending longitudinally of said casinganda plurality of blades mounted upon said shaft and ,extending to the Wall of said casing, .in combination with means upon the shaft for locking said blades to the shaft during-certain portions -of each rotation of the shaft, a screw-threaded member uponsaid casing and means upon each blade adapted ,to L00 V bination with means for rotating said shaft i operate with said threaded member totemsaid threaded member.

porarily control tlie'movement of said blade, I and means connected to said shaft for rotating' said threaded member.

27.In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaft and extending to the wall of said casing, in com-.

bination with means upon the'shaft for suecessively engaging the blades and moving each blade a part, of a rotation, a screwthreaded member upon said casing, and means upon each blade adapted to cooperate with said threaded member as the blade is released from said shaft and control the movement of the'blade, and means for rotating said threaded member. f

28. In a device of thekind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaft and extending to the wall of said casing, in combination with meansupon the shaft forsucces sively engaging the blades and moving each blade a part of a rotation,'a screw-threaded 7 member upon said casing with its axis positi'oned at substantially right angles of the central line of said casing and means upon each blade adapted to cooperate with sa1d threaded memberas soon as sa1d blade is released from said shaft to control the movement of said blade, and means for rotating 7 said threaded member.

29. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a pluralityof blades mounted upon said shaft and eX- tending to the wall of sa1d-casing, 1n combination wlth means upon the shaft for successively engaging the blades and moving each .bladea part of a rotation, a screwthreaded member upon said casing with its axis positioned at substantially right angles to the center line ofsaid casingand a roller rotatably mounted upon each blade adapted to cooperate with'said threaded member as soon as the blade is released from said shaft to control the movement of said blade, and means connected to said shaft for rotating threaded member to -'co'1itrol the movementof said blade and means for rotating said threaded member.

31. In a deviceof thekind described, a: cylindrical casing, a shaft extending-long tudinally, of said3casing and a plurality of blades mounted upon said shaft-and extend-1 ing'to the wall of said casing, in combination with automatic mechanism mounted upon sa1d shaft adapted to successively en- I gage said blades and move each blade incle- 'pendently a part of a rotationfmeans.upon V the casing for controlling the engagement and disengagement of said mechanism and a V I screw-threaded .member upon the casing with its axis positioned at substantially right angles tothe-center line of said-casing, and means upon each bladeadapted to coiiperate with said threaded member to periodically control the movement of said blade, and means for rotating said threaded member. 7 i

32.111 a device the kind described, a

cylindricalcasing, a shaft extending longitudinally of said casing and'a plurality of blades mountedupon said shaft and extend-f ing to the wall of said casing, in' combina- 7 tion with automatic mechanism "mounted upon said shaft adapted to successively engage said blades and move each blade a part of a rotation, means upon the casing for con= trolling the engagementand disengagement of said mechanism, ascrew-threaded member upon the casing and a roller rotatably mounted upon each blade adapted to coop: crate with said threaded member to periodically control the movement'of said blade,

and. means "for rotatingv said threaded member;

33. In adevice of cylindrical casing, a shaft extending longitudinally of said casing and a plurality of. blades mounted upon said shaft and extend}.

:the kind described, a,

ing to the wall of said casing, incombination with automatic mechanism mou'nted upon said shaft adaptedto successively engage said bladesand move each blade a part of a rotation, 'means uponlthe casing for controlling the engagement and disengage; ment of said mechanism, a screw-threaded member upon said casing, and means upon; each blade adapted to cooperate withsaid threaded member to periodically control the movement of said blade, and means connected to said shaft for rotating said threaded member. v g V 34. In a device of the kind described, a

cylindrical casing, a shaft extending longi tudinally of said casing and a plurality of blades mounted upon said shaft and extending to the wall of saidcasing, in combination with automatic mechanism mounted upon said shaft adapted. to successively engage said blades and move each blade at tudinally of said casing partof a rotation, means upon the casing cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaft and extending to the Wall of said casing, in combination With automatic mechanism mounted upon said shaft adapted to successively engage said blades and move of a rotation, means upon the casing for controlling the engagement and disengagement of said mechanism and a screw-threaded member upon said casing With its axis posi tioned at substantially right angles to the center line of said casing and a roller rotatably mounted upon each blade adapted to cooperate With said threaded member to control the movement of said blade and means for rotating said threaded member.

36. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaft and extending to the Wall of said casing, in combination With automatic mechanism mounted upon said shaft adapted to successively engage said blades and move each blade a part of a rotation, means upon the casing for controlling the engagement and disengagement of said mechanism and a screw-threaded member and a roller rotatably mounted upon each blade adapted to cooperate With said threaded member to control the movement of said blade, and means connected to said shaft for rotating said threaded member.

37. In a device of the kind described, a cylindrical casing, a shaft extending longiand a plurality of blades mounted upon said shaft and extending to the Wall of said casing, in combination With automatic mechanism mounted upon said shaft adapted to successively engage said blades and move each blade a part of a rotation, means upon the casing for controlling the engagement and disengagement of said mechanism and a screw-threaded member upon said casing With its axis positioned at substantially right angles to the center line of said casing, a roller rotatably mounted upon each blade adapted to cooperate With said threaded member to control the movement of said blade, and means connected to said shaft for rotating said threaded member.

each blade a part 88. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon. said shaft and extending'to the Wall of said casing, in combination with a pair of drivers rigidly mounted upon said shaft one at each end of said casing, automatic mechanism mounted upon each driver adapted to successively engage said blades and move each blade a part of each rotation, means upon the casing for controlling the engagement and disengage ment of said mechanism and a screw-threaded member mounted upon said casing and means upon each blade adapted to cooperate With said screw-threaded member to temporarily control the movement of said blade, and means for rotating said threaded member.

39. In a device of the kind described, a cylindrical casing, a shaft extending longi tudinally of said casing and a plurality of blades mounted upon said shaft and extending to the Wall of said casing, in combination with a pair of drivers rigidly secured to said shaft one at each end of said casing, automatic mechanism mounted upon each driver adapted to successively engage said blades and move each blade a part of a rotation, means upon the casing for controlling the engagement and disengagement of said mechanism and screw-threaded member upon said casing positioned intermediate said drivers, and means upon each blade adapted to coiiperate With said threaded member to control the movement of said blade temporarily, and means for rotating said threaded member.

40. In a device of the kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mounted upon said shaft and extending to the Wall of said casing, in combination with a pair of drivers rigidly mounted upon said shaft, one at each end of said casing, automatic mechanism mounted upon each driver adapted to successively engage said blades and move each blade a part of a rotation, means upon the casing for controlling the engagement and disengagement of said mechanism and a screw-threaded member upon said casing positioned intermediate said drivers and extending substantially at right angles to the center line of said casing and a roller rotatably mounted upon each blade adapted to cooperate With said threaded member to periodically control the movement of said blade and means connected to said shaft for rotating said threaded member.

41. In a device ofthe kind described, a cylindrical casing, a shaft extending longitudinally of said casing and a plurality of blades mountedupon said shaft and extending to the Wall of said casing, in combination Witha pair of drivers rigidly mounted upon said shaft one at each end of said casing, automatic mechanism mounted upon each driver adapted to successively engage said blades and move each blade a part of a 1'0- tation, means upon the casing for control ling the engagement and disengagement of said. mechanism and a screW-threaded member upon said casing positioned intermediate said drivers and controlled by the movement of said shaft, and means upon each blade adapted to cooperate with said threaded member to temporarily control the move} ment of said. blade.

In testimony whereof, I have hereunto signed my name in the presence of tWo subscribing Witnesses. r

' CHARLES H. BIRCH.. Witnesses: f

BURTON U. HILLS,

BLANGHE CHALMERS.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. G. 

